Cement-mold.



R. E'. .HANNEMAN.

l OBMENT MOLD. APPLICATION FILED ME.14, 1908.

Q'l. Patented N0v.15,1910.

F 2 SHEETS-SHEET 1.

IN VEN TOR WITNESSES:

A TTORNE V5 l R. 1:". HANNEMAN.

CEMENT MOLD.

APPLICATION FILED MAR. 14, 190s.

INVENTOR ROBERT F'. HANNEMAN A TTORNEYS eresia.

, cementitious material wherein a section isv normar r. Henneman, or nn'rnorr, moineau.

CEMENT-MOLD.

Specification of Letters Patent. Application Jed March 14, 1908. Serial No. 421,077.

Patented Nov. 15, 1910.

vTo all 'whom lit may concern:

In buil ing stacks, chimneys or the like of molded in place and then added to as it. sets suiciently to carry the weight, so that a hom eneous or integral structure is obtain process of construction to have a special mold for each stack and to carry this mold up as the work progresses, with new forms and sides to obtain the taper or batter and give the requisite varying cross-section, all with waste of time and material, and consequent expense.

This invention relates to a mold for a concrete or cement stack which may be removed, contracted and reset as the struct-ure advances, which is adapted to preserve the required batter and the gradual change in cross-section without special forms, falsework or girders, and which may be used repeatedly for different stacks or chimneys.

The invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims.

In the drawings, Flgure 1 is a plan view of a stack with a mold therefor which embodies features of the invention. Fig. 2 is a View in elevation of a pair of mold sections, the lower portion being broken away to give View of the interior forms. Fig. 3 is a view in detail of a mold for a square chimney. Fig. 4 is a` view in perspective of a modified form of the mold more especially ada ted for a smaller stack. Fig. 5 isa view in etail of. a clamping bar, corner boards and guide brackets. Fig. 6 is a view show- 'a pair of mold sections in operative positlon on a stack.

In general terms, theV mold consists of an inner and an outer form, each divided transversely into two sections which may be placed on end one above ,the other. As herein shown, each section of the outer form consists of corner members l whose wings are united at the properangle for the square or polygon desired, and are reinforced near each end by suitably disposed battens 2 and it is necessary under the ordinary corner irons 3. The interval or space be-` tween the several pairs of wings is filled by a plurality of narrow s acing strips 4 of equal width, the whole Ibeing clamped to. gether by bolts 5 passing through brackets 6 on the inner ends of the battens. Each board constituting one of the wings of the corner member is tapered from bottom to top so that each section is contracted to give the desired batter tof the stack, and each of an7 -srafrarpFFCE I the spacing stri s 4 is preferably equal in f Width to the di erence in width between the top and bottom ends of each panel or side of a section. Mating dowel plates 7 at the corners of each section hold them in alinement. The inner form sections are similarlyl constructed of corner members 8 reinforced by battens 9, and corner irons 10, lwith spacing strips 11 and clamping bolts 12 in brackets 13. Longitudinal displacement of the parts is prevented by suitable pins 14 or stops registering with apertures 15. In operatlon the corresponding sections of the inner and outer forms are set in place and the mold filled preferably to about the point indicated by the dotted line X. The upper sections are then placed in position and filled to near the top, as indicated by the upper dotted line Y. A ter the cement is suliciently set, the lower sections are readily removed, and are placed on the upper ends of the standing section, a spacing strip being removed from each panel and the form contracted so that its base mates with the top of the supporting section. This process of filling and shifting the mold is repeated until the structure is completed, the removal of the same number of s acing strips each time formi the proper atter, and the mold itself not eing` injured or destroyed. Thus' a square, hexagon, Octagon or other polygonal mold may be used for any of a number vof similarly proportioned stacks.

By not illing the sections completely, a v

smooth exterior is obtained Without forming a 'seam or ridge at the juncture ofthe sections. While this construction is preferable for large stacks, a modification thereof, such as shown in Figs. 4 and 5, may be used more advantageously for small chimneys. In such construction, battens 1.7 are each removably secured to longitudinallyI tapered corner boards 18, which are not united at the meeting edges, b an angle iron ledge 19 O1 guide strip slidab e in brackets 20 on the corner board, the ends of the battens of adjacent sides overlapping and being adjustably Setracted or expanded. The battens of theouter form have guide brackets 25 on Atheir upper sides by which narrow extension strlps 26 may be secured on the upper end of the upper section, the ends being disposed as shown whereby they may be adapted to fit the v.form as it is made smaller or larger. The inner form is substantially the same as inthe other construction with a temporary extension for its upper end. The mold is filled to the top of the extension and the latter removed, the next section being seated directly on the lower section, and the extension placed above. .Thus the projecting body of the cementacts as a ide in placing the forms, and any seams ormed bythe junction of the sections are avoided.

A square or 'poly onal mold once constructed with standar taper or batter is thus available for any number of correspondingly projected stacks. The spacing strips hold the corner boards in such relation that the batten of the wall is obtained without the use of external guides or false arch, the removal of the strips one by one as the mlds are alternately advanced up the stack insuring the proper diminution 1n the wall thickness as the top is approached. No materlal is wasted in making temporary molds as the latter are readily adjusted for any desired size of stack.

Obviously changes in the details of con.- struction may be madewithout departing from the spirit of the invention, and I do not care to limit myself to any particular form or arrangement of parts.

What I claim as' my invention is 1. Arnold for cement poles or the like comprising, in combination, a plurality of moldsectionsv to be placed one upon the other yramidically and decreasing in size from bottom to top, each of said sections being composed of right-angular and interchangeable corner members and a plurality of interchangeable leaves connecting each two ofthe corners, dowels for detachably retaining the members of each section together, clamps for positively locking the members of the sections together and dowels for retaining the sections in alinement with eachv other.

2. A mold for concrete poles or the like comprising a plurality of upwardly decreas- 'ing superlmposed mold-sections each composed of four right angular corner. members formed identical with each other, a. plurality of leaves connecting two of the corner members, dowels for retalnmg the corner memplurality of separab bers and the leaves of each section in alinement with their com lementary members, a le clamps surrounding each section to retain the members positively against pressure from within the mold, and dowels for connectin the sections together in alinement with eac other.

3. A mold for formin cement poles or the like, comprising aplura ity of upwardly extending sections resting one upon the other, each section comprising angular corner members formed identical with each other and separated by intervenin leaves formed identical with each other an connecting each two of the corner members, means for detachably connecting the leaves to ether between each two corner members an with their adjoining members,`means for connecting the sections together, and means for securin each of the sections against pressure within the mold.

4. mold for forming cement poles, comprising a plurality of upwardly extending sections resting one upon the other and so formed as to provide a mold decreasing in diameter from bottom to top, means for retaining the sections in alinement with each other, and means for -securing the mold against pressure from within.

I5. In a mold for the urpose specified, a polygonal form divided) transversely into two equal sections, `each consisting of corner members whose an le edges are inclined to the section axis, a p urality of lon itudinally disposed spacing strips remova ly secured between the adjacent parallel margins of each pair of corner pieces, forming therewith the facets of the section, and clamping members secured to the corner members adapted to clam the corners and strips tolgether, adjustab e in length to accommodate iferent numbersof strlps.

6. In a mold for the urpose specified, a polygonal form uniformi) to end, and divided transversely into two equal sections, each section consisting of corner members whose angle edges are inclined to the section axis, a plurality of longitudinally disposed spacing lstrips between each air of corner members forming therewith tiie facets of the section, transversely disposed battens near each end of each facet secured to the corner member thereof` and adapted to hold the corner members and strips in place, and securing means engagin the battens ada ted to permit longitudina ad'ustment of t e battens to accommodate di erent numbers lof strips. l

7. In a mold fory the 'urpose s ecified, la polygonal form unifor y tapere from end to end and divided transversely into two equal sections, each section consisting' of corner members whose angle ed es areinclined to thesection axis, a plura ity of lony tapered from end v each pair of corner members forming therewith the facets of the section, transversely disposed battens near eachend of each facet secured to the corner member thereof and adapted to hold the corner members and strips in place, securing 'means engaging y the battens, adapted to permit longitudinal adjustment of the battens to accommodate dierent numbers of strips, andl interlocking guides at the corners of each section adapted to secure the two sections in axial alinement.

S. In a mold for the purpose specified, a polygonal form uniformly tapered from `end to end, and divided transversely into two equal sections, each section consisting of corner memberswhose angle edges are inclined \to the section axis, a plurality of longitudinally disposed spacing strips between each pair of corner members forming therewith the facets of the section, transversely disposed two-part battens near each end bf each facet secured to the corner member thereof and adapted to hold the corner members and strips in place, clamping bolts connecting the parts of each batten adapted to permit longitudinal adjustment of the battens to accommodate different numbers of strips.

9. In a mold for the purposes specified, a form divided transversely into two equal sections, each section comprising corner memberseach formed of two longitudinally tapered wings secured together along their oblique edges, battens horizontally securednear each end of the corner members, a plurality of longitudinally disposed rectangular spaclng strips between the adjacent edges of each palr of wings forming therewith the facets of the section, brackets on the adjacent ends of each pair of battens, and a clamping bolt engaging each pair of brackets.

l0. In a mold for the purposes described a form consisting of corner members each consisting of a pair of longitudinally tapered boards with their oblique margins in con- .tact a plurality of spacing strips extending -iongauainauy of the form and suing the space between the inner parallel margin of the corner boards of the facets, and transversely disposed'members on each 'facet secured to the corner boards thereof provided with clamping means extensible longitudinally of the members.

l1. In a mold for the purposes described a' form consisting of corner members each consisting of a pair of longitudinally .tapered boards with their oblique margms in contact, a plurality of spacing strips extending longitudinally of the form and lillin the space between the inner parallel margln of the corner boards of the facets, and transversely disposed members on each facet secured to the corner boards thereof provided with clamping means extensible longitudi ROBERT F. HANNEMAN. Witnesses:

C. R. STICKNEY, OTTO F. BARTHEL. 

